Automatic train-stop.



F. H. WORKMAN.

AUTOMATIC TRAIN STOP.

APPLICATION FILED JUNE 25. I915.

1 ,1 92,254. Patented July 25,1916.

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F. H. WORKMAN.

AUTOMATIC TRAIN STOP. APPLICATION FILED JUNEZS. 1915.

Patented July 25, 1916.

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Suva/whom I. If. War/4'1 an wiwwe n FRANK H. \VORKMAN, OF CLEVELAND, OHIO.

AUTOMATIC TRAIN-STOP.

Specification of Letters Patent.

Application filed June 25, 1915. Serial No. 36,353.

To all whom it may concern:

Be it known that I, FRANK H. l/VORKMAN, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented new and useful Improvements in Automatic Train- Stops, of which the following is a specification.

This invention relates to automatic train stops of the class wherein a trip carried by the locomotive comes into contact with a track obstacle operated by the semaphore.

an object of the invention is to provide a track-carried instrument in combination with a train-carried mechanism whereby the operatic-11 of the apparatus is assured irrespective of climatic conditions.

Another object of the invention is the provision of a track instrument in which means is provided for minimizing the amount of friction when operated so that the semaphore will be relieved of excessive strain.

A still further object of the invention is to provide a track instrument wherein the track upon which the instrument travels will be protected to a great extent by an overlapping portion that is formed integral with the track.

The invention consists in the features of construction, combination, and arrangement of parts, hereinafter fully described and claimed, reference being had to the ac companying drawings, in which:

Figure 1 is a side elevation of a portion of a locomotive showing the train-carried mechanism. Fig. 2 is a sectional view showing the train-carried mechanism in eleva-- tion. Fig. 3 is a side elevation of the track instrument showing its connection with the semaphore. Fig. 4c is an enlarged top plan view of the track instrument. Fig. 5 is a longitudinal section therethrough. Fig. 6 is a cross sectional view. Fig. 7 is a perspective view of one of the rail sections. Fig. 8 is a perspective view of the upper portion of the rod.

The train-carried mechanism comprises a depending rod 1 having its lower extremity inclined rearwardly as shown at 2 and its upper extremity pivoted to a lJ-shaped member 3 rotatably mounted on the top of the cow catcher beam-as clearly shown in Fig. 8 of the drawing. The U-shaped member 3 has connected thereto one extremity of a coil spring 4. The remaining extremity of the coil spring has connection with one Patented July 25, 1916.

extremity of a cable 5 that passes around a I sheave 6 and makes connection with an arm 7 having a segmental toothed portion 8, the latter cooperating with a gear 9 carried upon the valve stem of the valve indicated at 10. This valve 10 is arranged in the branch pipe 11 that has connection with the main train line, whereby upon opening of the valve, air from the train line will pass through pipe 11 to the atmosphere.

Pivotally connected to the rod 1 is a horizontal rod 12 encircled by a coil spring 13, the function of which being to retain the rod 1 and one arm of the member 3 in a vertical position. The end of the rod 1 is forked so as to straddle the depending arm of the member 3 whereas'the outer end of the rod 12 abuts one side of the rod 1.

The track obstacle comprises track sec tions 14, each being U-shaped so that the portion 15 will overlie the main rail portion 16, a space 17 being left between the portions. The free extremities of the main rail portions has passing therethrough a pin 18 upon which is mounted at an intermediate point a sheave wheel 19 for a purpose hereinafter described.

Riding upon the rail portion 16 in the spaces 17 are flanged wheels 20 rotatably mounted upon axles 21 carried upon the frame 22 of the track instrument. This frame 22 is provided with spaced bearings 24 and 25 in which are mounted the stub shafts 26 formed on a roller 27 The axis of this roller lies at right angles to the length of the track, so that the roller will turn during contact with the bent extremity 2 of the rod 1 when the track instrument is in danger position.

For moving the track instrument toward or away from the track way, according to whether the block is occupied or not, I provide a pair of cables 28 passing around spaced sheave wheels 29 and 30, one of said cables passing around the wheel 19 heretofore mentioned and connected to one end of the same, while the remaining cable makes direct connection with the opposite end of the frame. The remaining extremities of the cables are connected to opposite ends of a central pivoted lever 31 arranged in close proximity to the semaphore blade 32,v connection being made between the semaphore and the lever by way of a link 33.

From the foregoing description, it will be seen that as the semaphore blade 82 moves to danger position, the track instrument or obstacle will be moved toward the track way by one of the cables whereas upon movement I from its bearing 34. This motion causes the cable 5 to move the arm 7 that in turn actuates the stem of the valve. Immediately the locomotive passes by the track instrument,

the spring 13 encircling the rod 12 restores the vertical rod 1 to its normal position, but, owing to the flexible action between the arm 7 and the upper extremity of the rod 1, the arm 7 is prevented from returning to its normal position, thus the valve is held open until the train comes to an absolute stop.

Having described my invention, what is claimed is:

1. In combination, a track instrument comprising a pair of spaced substantially U shaped track sections, a track instrument adapted to roll between the limbs of each U-shaped track section, and means for rolling the said track instrument.

2. In combination, a pair of spaced track sections, portions overhanging said track sections and formed integral with the latter, a frame having wheels mounted upon the track sections, and means for moving said frame.

3. In combination, a pair of spaced track sections, portions overhanging said track sections and formed integral with the latter, a frame having wheels mounted upon the track section, and means for moving said frame, said means comprising semaphore actuated cables.

4. In combination, a pair of spaced track sections each bent into the shape of a U, a frame provided with wheels arranged between and of a diameter equal to the spaces between the limbs of said ll-shaped track section, and means for reciprocating said frame between said spaced track sections.

5. In combination, a pair of spaced track sections, each bent into the shape of aU, a frame provided with wheels arranged between and of a diameter equal to the spaces between the limbs of said 'U-shaped track section, each of said wheels being provided with flanges arranged to contact with the sides of a track section, and a roller mount ed upon said frame and having its axis arranged at right angles to the axis of said wheels, and means for moving the said frame in a direction parallel to the said track section.

In testimony whereof I affix my signature in presence of two witnesses.

FRANK H. WORKMAN.

Witnesses:

E. S. POsTLETHWAITE, WILLIAM J. BLAIR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. l 

